According to the U.S. Environmental Protection Agency’s own scientific assessment reports (2004, 2009), Ultrafine particles (UFP) are considered more dangerous than PM2.5. EPA has determined that UFP can cause sudden death. “there is strong epidemiological evidence linking short-term (hours, days) exposure to PM2.5 with cardiovascular and respiratory mortality and morbidity.” Yet, EPA-funded experiments were conducted in elderly…

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